b16t4turbo

well this is my first post. i heard alot of good things about this site so please help.

i have a b16 bulit for turbo and its not running right. here's my set up.

<U>block</U>- dymanic sleeves, stock bore (81mm) je pistons with 9 to 1 compression on eagle rods.

<U>head</U>- stock type r with 1mm over-sized stanless steel all motor vavles, crower dual valvesprings and retainers, jg intake manifold, ctr intake and exhaust cams, skunk 2 sprockets, msd spark plug wires, ngk zfr7f-11 spark plugs, msd 6al with ss blaster, type r thottle body, missing link, str fuel rail, vortec fuel pressure regulator, rc 440 injectors.

<U>turbo set up</U>-custom turbonetics t4 ceramic ball bearing turbo, drag manifold, hks wastegauge, hks sequenchal blowoff valve, spearco front mount intercooler, greddy profecb boost controller, greddy turbo timer.

<U>other electronics</U>-apexi vfac, air/fuel ratio gauge.

well here's the problem, my turbo doesn't start to spool till like 6,000 rpm but the the car bogs down at about 5,000. i tried to play with the apexi and the most i got it to boost was 8 psi with the boost controller maxed out. i tried to switch to my friends 370cc injectors and they still bog down between 5-6000 rpm. i tried to use my 310cc injectors and it let me boost higher but it leans out. someone told me that it bog because of the injector so i tried all those other ones. i don't know what to do next, so any advice is very appreciated. thank you.